In the past, laminated glass was usually installed in the windshield, with side and rear windows being tempered only.
The difference is that tempered glass is per-stressed so that when it cracks, it shatters into many tiny and dull pieces. Laminated is the same thing, but with layers of plastic sandwiched with layers of tempered glass. Laminated glass will still shatter, but will be held together by the plastic layers.
In an emergency, small improvised, or purpose built tools meant to shatter tempered glass will be useless if the glass is laminated.
Those pieces are not dull. They're just not jagged and shaped like knives like normal glass. I accidentally broke the rear window on my truck and, thinking it was dull like you described, started to pick it up with my hands. Big mistake.
The issue with Tesla has never been that the windows are hard to break. The issue is that the rear doors are electronic with manual override hidden in a camouflaged panel at the bottom of the door pocket. A door pocket that was added to hold things. Those things will block access to the emergency door open.
And Tesla, being the helpful sort, also makes it hard to open the doors in an emergency. The front might have manual door release mechanism somewhere - good luck finding it when the car is on fire or sinking. The rear... not so much.
EuroNCAP is changing its testing regime to negatively score manufacturers who remove critical physical controls and it should probably include door handles in that regime.
You're not breaking a tempered glass without the designated tool either and almost nobody has that. There's this famous clip of a news anchor demonstrating how "easy" it is to break a car window with a hammer and he needed like 8 attempts.
The reason Tesla was in the news over this was because a rich lady reversed into a pond. So the rear windows wouldn't be facing up in that situation...
Unsafe back seat passenger exit starts earlier than that, my 2005 Saturn had a set of horrible doors. I avoided carrying more than one passenger as often as possible.